Delta Elektronika SM15-200D Product Manual

Contents

Delta Elektronika SM15-200D Product Manual Manual pdf 17 page image

OPERATING - TROUBLE SHOOTING - CALIBRATING SM3000Page 4 - 6 DELTA ELEKTRONIKA B.V. rev. February 2018TROUBLE SHOOTING1) GENERAL• In case you need assistance for repairing a unit, please contactour engineers using the address "Support@Delta-Elektronika.nl".• In case you want us to repair the unit, please first fill out theRMA-form before sending the unit to us. Adding a detailed faultdescription will help us to repair the unit as soon as possible.On our website www.DeltaPowerSupplies.com the RMA-formcan be found under 'Support'.2) NO OUTPUT (normal operation)• Check input fuses.• Check position of prog. switches at the rear panel, they should beon MANUAL.• Check the connections on the SENSE BLOCK (at rear panel),there should be a link between + and S+ and between – and S–.• Set OVP potentiometer (at front panel) at maximum (fully clockwise).• Switch on unit.• Turn both the CV and CC potentiometer a few turns clock-wise. Avoltage should be present on the output.3) PROGRAMMING DOES NOT WORK OK• Check position of prog. switches at rear panel.• The unit works OK in manual control, but in programmingmode the output voltage / current has a large error.Probably the fuse in series with Ø (pin 1) of prog. connector trip-ped, the fuse (F600 = 650 mA) is a self-resetting type (seefig. 4 - 16).• To check the fuse (F600) measure the voltage between Ø and theminus output, during the fault condition. The voltage should onlybe a few mV, a high voltage means that an unwanted current isflowing through pin 1 of the prog. connector.Please check why current is flowing through pin 1 (see also nextparagraph 4) and fig. 4 - 17).4) PROGRAMMING OFFSETS• Unwanted offsets in the programming can be caused byearth loops.Figure 4 - 17 shows a typical earthing problem. In case the loadhas a connec tion to earth and the programming source as well,problems could occur. Improper choice of the earthing point of theload can give a voltage drop of ∆V1. Connecting the minus or zeroto a separate earth connection can give a voltage drop of ∆V2. Be-cause the internal wires of the programming input are thin, thevoltage drops ∆V1 and ∆V2 will be across the internal wiring aswell. Resulting in a error voltage in series with the programmingvoltage.• The best solution for this is using a floating programming sourcewith the help of the ISO AMP CARD (δ-product) or a floating load.5) STATUS OUTPUTS FAIL• Check fuse F601 in series with Ø (pin 8) (see fig. 4 - 16). To checkthe fuse (F601) measure the resistance between Ø and the minusoutput, an open circuit means a blown fuse. F601 = 650 mA.6) MASTER / SLAVE PARALLEL PROBLEMS• Accidental interruption of a minus lead of a unit during operationwill cause fuse F600 to blow (see fig. 4 - 16). To check the fuse(F600) measure the resistance between Ø (pin 1 of prog. conn.)and the minus output, the fuse is a self resetting type.F600 = 650 mA• Check link between pin 9 and 11 on the prog. connector of theslaves• Current sharing is not ok. Probably the links between S– and – ofthe slaves are not removed.fig. 4 - 16Location of programming fuses on P432P432 is situated on the rear panelfig. 4 - 17Unwanted programming offsets

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